CN2247370Y - Improved structure for key switch - Google Patents

Abstract

The utility model relates to improved structure of a key switch. Three embedding slots which are respectively embedded with a sounding spring slice, a guide connection slice and a touch-pressing guide slice are arranged inside a cover body. A convex surface of large area which is provided with more than one guide connection points is protruded out of the guide connection slice. The touch-pressing guide slice is provided with a touch frame slice provided with at least one pressing slice, and a convex connection point for bending is formed at the lower end of the pressing slice and is corresponding to the guide connection points. Due to the guide connection points and the convex connection points are all twice formed, the utility model has the advantages of less arc-curvature, non-easy damage of a coating layer of the surface of the material, large contact area, no carbon deposit, high stability and a long service life.

Description

A kind of structure-improved of key switch

The utility model relates to a kind of structure-improved of key switch.

Chinese patent ZL94224784.1 discloses a kind of improvement type key switch.Its contact lamellar body is made of guide-joining plate and terminal, and the protruding contact corresponding section of guide-joining plate and terminal only is convexly equipped with one and connects a little, and body (as the key post) is pressed in the activity of pushing, and makes the protruding contact of terminal and the overlap joint mutually that connects a little of guide-joining plate, thus the interlock circuit conducting.Connect a little point of all big and its shape of circular arc curvature with protruding contact, and it all adopts the punching press one-shot forming, very easily causes material surface coating destroyed, influences contact performance; And because of contact terminal is one group, contact area is little, easily produces carbon distribution, poor stability, and button is short useful life.

The purpose of this utility model is to provide a kind of structure-improved of key switch, and its contact performance is good, long service life.

For achieving the above object, key switch of the present utility model is made up of members such as lid, pronunciation shell fragment, contact lamellar body, flexible member, press element and bases, and the contact lamellar body comprises guide-joining plate and presses guide card.Wherein: lid is a short side housing in, a through hole is established at its top, do upper and lower motion with the guiding press element, first caulking groove is offered in appropriate position at lid portion inside one distolateral plate, embed for a pronunciation shell fragment, and offer two second and third parallel caulking grooves in the appropriate position of the relative side plate of its corresponding end, and embed for pressing guide card and guide-joining plate respectively, the projection that can fasten with base is set respectively in the outside corresponding dual-side of lid appropriate position in addition; Press element is the hollow inverted T-shaped, can sheathed flexible member under it is inner; Offer an arc separate slot on the guide-joining plate, separate slot top is convexly equipped with the bigger convex surface of an area, is convexly equipped with more than one connecting a little on the convex surface again, and appropriate location, separate slot below connects establishes one and be thin-and-long second and connect pin downwards; Press and establish one on the guide card and be anti-L shaped first and connect pin, the appropriate location that connects the pin horizontal component extends a tetragonal shake-up frame sheet downwards, establishes one or more sheets that compress in the frame sheet, compresses sheet lower end correspondence and connects the protruding contact that a little position forms bending respectively; The base both side edges upwards extends an enchasing plate that fastens with lid both sides projections respectively, and base is engaged with lid, and relative guide-joining plate of base and the position that presses guide card are offered two perforation respectively, connect pin for first, second and stretch out.

Adopt said structure, the utility model is because of being convexly equipped with a larger area convex surface earlier on the guide-joining plate, on convex surface, be convexly equipped with again and connect a little, compress sheet and press to establish on the guide card, compress the sheet lower end and be bent into protruding contact, connect a little and protruding contact circular arc curvature less, eliminated the easy ruined bad phenomenon of material surface coating; Because of more than one group of contact terminal, contact-making surface is big, can not produce carbon distribution again, and stability is high, long service life.

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is a three-dimensional exploded view of the present utility model;

Fig. 2 is that the utility model presses the press element working state figure;

Fig. 3 is another embodiment three-dimensional exploded view of the utility model;

Fig. 4 is that another embodiment of the utility model presses the press element working state figure;

Fig. 5 is the enlarged drawing that the utility model presses guide card.

See also Fig. 1, the utility model mainly is made up of members such as lid 1, pronunciation shell fragment 2, contact lamellar body 3, flexible member 4, press element 5 and bases 6, and this contact lamellar body 3 comprises guide-joining plate 31 and presses guide card 32; Wherein: lid 1 is for being the square housing of hollow, a through hole 11 is established at lid 1 top, do upper and lower displacement with guiding press element (as the key post) 5, and offer first caulking groove 12 in the appropriate position of lid 1 an inner end, embed for pronunciation shell fragment 2, offer two second, third parallel caulking grooves 13,14 in the appropriate position of lid 1 an inner corresponding end in addition, embed for laminar guide card 32 and the guide-joining plate 31 that press of elasticity respectively, be respectively equipped with the fastening projection 15 that covers with base 6 at lid 1 both sides external limit appropriate location; Press element 5 is hollow inverted T-shaped shape, within it subordinate side's centre be provided with one can sheathed flexible member (as spring) 4 newel 51; Offer a curved separate slot 311 on the guide-joining plate 31, the top of corresponding separate slot 311 is convexly equipped with two and connects a little 312; Connect on the appropriate location of this guide-joining plate 31 belows one side and establish one downwards and be second of thin-and-long and connect pin 313; Press and establish one on the guide card 32 and be anti-L shaped first and connect pin 321, extend one downwards at the appropriate location that connects pin 321 horizontal components and be tetragonal shake-up frame sheet 324, establish one in the frame sheet 324 and compress sheet 322, this compresses connect the protruding contact 323 (as shown in Figure 5) that a little 312 position formation bend of the lower end of sheet 322 corresponding to guide-joining plate 31; Base 6 is offered two perforation 61,62 at the appropriate location of bottom surface, connect pin 313 and press first of shell fragment 32 for second of guide-joining plate 31 respectively and connect pin 321 and pass, the both side edges of base 6 then upwards extend respectively one can be chimeric with the fastening projection 15 of lid 1 both sides enchasing plate 63.

Above-mentioned member is assembled into one, sees also Fig. 2.Pressing press element 5 makes it produce displacement downwards, at this moment, interlock presses the shake-up frame sheet 324 of guide card 32 and compresses sheet 322, and the protruding contact 323 that presses guide card 32 312 is overlapped with connecting a little of guide-joining plate 31, and then makes it second and first connect pin 313,321 and interlock circuit forms a path; When the external force disappearance, press element 5 springs back to original position, and the lap-joint that presses guide card 32 and guide-joining plate 31 separates, and forms open circuit with interlock circuit.

See also Fig. 3, the utility model also can extend one downwards and be tetragonal shake-up frame sheet 324 pressing appropriate location that guide card 32 first connects pin 321 horizontal components, extend downwards respectively in the frame sheet 324 two corresponding and keep suitable spacing compress sheet 326,326 ', and compress sheet 326,326 ' the connecting a little on 312 the position of the corresponding guide-joining plate 31 in lower end, form respectively the two protruding contacts 325,325 that bend '.Press press element 5 interlocks press the frame sheet 324 of guide card 32 and compress sheet 326,326 ', the protruding contact 325,325 ' respectively that presses guide card 32 312 is overlapped with connecting a little of guide-joining plate 31, as shown in Figure 4, and then make second and first to connect pin 313,312 and interlock circuit forms a path.

Claims (1)

1, a kind of structure-improved of key switch, comprise lid, press element, pronunciation shell fragment, guide-joining plate, press formations such as guide card, base, it is characterized in that: lid is a hollow housing, a through hole is established at its top, offer first caulking groove on the inner distolateral plate, and establish second and third caulking groove on the relative side plate of the other end; Press element is placed in the lid, and stretch out from the lid through hole at the element top, the sheathed flexible member of element internal; The pronunciation shell fragment is placed in first caulking groove of lid; Guide-joining plate is placed in the 3rd caulking groove of lid, offers a curved separate slot on the guide-joining plate, and separate slot top is convexly equipped with more than one connecting a little, and guide-joining plate below one side joint establishes one and be second of thin-and-long and connect pin downwards; Press in second caulking groove that guide card is placed in lid, press and establish one on the guide card and be anti-L shaped first and connect pin, this connects and extends one on the pin horizontal component downwards and be tetragonal shake-up frame sheet, establish in the frame sheet and compress sheet, the corresponding guide-joining plate in lower end that compresses sheet connects the protruding contact of position formation bending a little; Base engages with lid, and corresponding first, second in its bottom surface connects the placement of foot place, offers a perforation respectively, for its protuberate basic unit.